diff --git a/src/XMPPConnection.m b/src/XMPPConnection.m
index c1471c4..695130b 100644
--- a/src/XMPPConnection.m
+++ b/src/XMPPConnection.m
@@ -251,7 +251,7 @@
 	OFEnumerator *enumerator;
 
 	if (server)
-		[sock connectToHost: server
+		[sock connectToHost: [self XMPP_IDNAToASCII: server]
 			       port: port];
 	else {
 		@try {